Some of the improvements attained by EVER-POWER drives in energy effectiveness, productivity and process control are truly remarkable. For instance:
The savings are worth about $110,000 a year and also have cut the company’s annual carbon footprint by 500 metric tons.
EVER-POWER medium-voltage drive systems enable sugar cane plants throughout Central America to become self-sufficient producers of electricity and enhance their revenues by as much as $1 million a year by selling surplus capacity to the local grid.
Pumps operated with adjustable and higher speed electrical motors provide numerous benefits such as greater range of flow and mind, higher head from a single stage, valve elimination, and energy saving. To achieve these benefits, nevertheless, extra care must be taken in choosing the correct system of pump, electric motor, and Variable Speed Motor electronic electric motor driver for optimum conversation with the process system. Successful pump selection requires knowledge of the complete anticipated selection of heads, flows, and specific gravities. Engine selection requires appropriate thermal derating and, sometimes, a matching of the motor’s electrical feature to the VFD. Despite these extra design factors, variable speed pumping is becoming well accepted and widespread. In a straightforward manner, a dialogue is presented about how to identify the huge benefits that variable acceleration offers and how to select components for trouble free, reliable operation.
The first stage of a Adjustable Frequency AC Drive, or VFD, is the Converter. The converter is made up of six diodes, which act like check valves found in plumbing systems. They allow current to stream in mere one direction; the direction proven by the arrow in the diode symbol. For instance, whenever A-phase voltage (voltage is comparable to pressure in plumbing systems) can be more positive than B or C stage voltages, after that that diode will open up and invite current to movement. When B-phase becomes more positive than A-phase, then your B-phase diode will open and the A-phase diode will close. The same holds true for the 3 diodes on the negative side of the bus. Therefore, we get six current “pulses” as each diode opens and closes.
We can get rid of the AC ripple on the DC bus with the addition of a capacitor. A capacitor functions in a similar style to a reservoir or accumulator in a plumbing program. This capacitor absorbs the ac ripple and provides a simple dc voltage. The AC ripple on the DC bus is typically significantly less than 3 Volts. Thus, the voltage on the DC bus becomes “approximately” 650VDC. The actual voltage will depend on the voltage degree of the AC line feeding the drive, the level of voltage unbalance on the power system, the engine load, the impedance of the power system, and any reactors or harmonic filters on the drive.
The diode bridge converter that converts AC-to-DC, is sometimes just known as a converter. The converter that converts the dc back to ac is also a converter, but to distinguish it from the diode converter, it is usually known as an “inverter”.

Actually, drives are a fundamental element of much bigger EVER-POWER power and automation offerings that help customers use electricity effectively and increase productivity in energy-intensive industries like cement, metals, mining, coal and oil, power generation, and pulp and paper.